Title :
94 GHz integrated monopulse antennas
Author :
Ling, C.C. ; Rebeiz, G.M.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
A monolithic direction-finding monopulse antenna for applications at 94 GHz has been designed. The structure consists of a single-dipole suspended in one plane of an integrated horn cavity to obtain the sum pattern, and an anti-parallel pair of dipoles suspended in a different plane of the same horn cavity to achieve the difference pattern. The resonant input impedances of the sum and difference antennas were measured using a microwave model. The resonant input impedances are 53 Omega and 43 Omega , respectively. with a bandwidth +or-8% of the center frequency for a voltage standing wave ratio of 2. Microwave patterns of each antenna were measured at 3.3 GHz, and the difference antenna produced a sharp null below -25 dB across at +or-10% bandwidth.<>
Keywords :
antenna feeders; antenna radiation patterns; dipole antennas; electric impedance; microwave antennas; radar antennas; 3.3 GHz; 94 GHz; EHF; SHF; VSWR; anti-parallel dipole pair; center frequency; difference pattern; integrated horn cavity; microwave model; monolithic direction-finding monopulse antenna; radar antennas; resonant input impedances; sum pattern; voltage standing wave ratio; Antenna measurements; Bandwidth; Dipole antennas; Directive antennas; Frequency; Impedance measurement; Microwave antennas; Microwave measurements; Navigation; Resonance;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1991. AP-S. Digest
Conference_Location :
London, Ontario, Canada
Print_ISBN :
0-7803-0144-7
DOI :
10.1109/APS.1991.175010
